Media Matters didn’t look directly at scientific statements–instead they looked at the number of guests, across TV news, who were either for or against EPA regulation of greenhouse gases. Still, presuming that the anti-regulation guests also made misleading scientific statements (no big assumption, given the way this debate tends to go), the result is closely related. And even if they did not, the strong bias with respect to policy vies hints at the likely bias with respect to science:

Media Matters analyzed television news guests who discussed the Environmental Protection Agency’s role in regulating greenhouse gas emissions from December 2009 through April 2011. Driven largely by Fox News Channel and Fox Business Network, results show that in 76 percent of those appearances, the guest was opposed to EPA regulations while 18 percent were in favor.

Drilling down on Fox in particular:

81% Of Fox Guests And 83% of Fox Business Guests Opposed GHG Regulation. Fox News hosted 52 guests who criticized the EPA’s decision to regulate greenhouse gases. In that same period they featured only 10 supporters and two guests who took a neutral stance. Fox Business hosted opponents 65 times, compared to seven appearances by supporters. MSNBC hosted four times more supporters of EPA’s action than opponents, but had far fewer guests commenting on the issue than did Fox.

Fox swayed the total so much because the other channels studied were less likely to feature opinionated guests.